Works consulted:

Field Theory - Kurt Lewin by James Neill, 20 April 2004
http://www.wilderdom.com/theory/FieldTheory.html

Kurt Lewin (1890-1947) Compiled by Julie Greathouse (May 1997), Muskingum College Department of Psychology
http://muskingum.edu/~psych/psycweb/history/lewin.htm

Kurt Lewin, Wikipedia
http://en.wikipedia.org/wiki/Kurt_Lewin

Kurt Lewin Biography (1890-1947) by Kendra Cherry
http://psychology.about.com/od/profilesofmajorthinkers/p/bio_lewin.htm

Kurt Lewin: Groups, Experiential Learning, and Action Research by Mark K. Smith 2001, updated on May 29, 2012
http://www.infed.org/thinkers/et-lewin.htm

Kurt Lewin, Psychologists and their Theories for Students
http://www.encyclopedia.com/article-1G2-3456300031/lewin-kurt.html

Kurt Lewin: Psyography: Internet Source for Biographies on Psychologists by Scot Perron, Frostburg State University
http://faculty.frostburg.edu/mbradley/psyography/lewin.html

Kurt Lewin Quotes by Kendra Cherry
http://psychology.about.com/od/psychologyquotes/a/lewinquotes.htm